Add /help command with list of available bot commands

[SaharPak]

Context

Users and admins need a quick reference of what the bot can do.

What to do

1. Add a /help command handler in src/handlers/admin_commands.py
2. Show different output for admins vs regular members:
   • Members: basic info about the bot, link to rules
   • Admins: full command list with descriptions

Example output (admin)

🤖 TIHelperBot Commands

👤 Members:
/start — Bot introduction
/help — This message

🔧 Admins:
/stats — Community statistics
/approve_all — Approve pending join requests

Acceptance Criteria

• /help works for all users
• Admin commands only shown to admins
• Register command with handler in main.py

[Kaaveh]

For my next issue, I'll be happy to work on this issue 🙌

[Kaaveh]

@Isusami

[Isusami]

Thanks Kaveh.

[Kaaveh]

Thank you guys! 🙌

[Kaaveh]

Hey @SaharPak , I hope you're doing well.
This has been implemented in #18 (commit 82f3d57). All acceptance criteria are met:

• ✅ /help works for all users — handled by help_command in src/handlers/admin_commands.py
• ✅ Admin-only commands are gated — output is role-based via render_help(user, is_admin=...) in src/services/help.py, so members see basic info + rules link while admins get the full command list
• ✅ Handler registered in main.py — app.add_handler(CommandHandler("help", help_command))

A couple of extras beyond the original scope:

• Localized templates for both audiences and languages (help_{admin,member}_{en,fa}.txt) with automatic Farsi/English detection from the user's Telegram locale
• Test coverage in tests/test_help.py

The PR closed #12 but didn't reference this issue, so it stayed open. Closing now as completed.